patch 8.2.2393: Vim9: error message when script line starts with "[{"

Problem:    Vim9: error message when script line starts with "[{".
Solution:   Do not give an error for checking for end of list.
diff --git a/src/dict.c b/src/dict.c
index fc8756c..b267e24 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -1032,7 +1032,8 @@
 
     if (**arg != '}')
     {
-	semsg(_(e_missing_dict_end), *arg);
+	if (evalarg != NULL)
+	    semsg(_(e_missing_dict_end), *arg);
 failret:
 	if (d != NULL)
 	    dict_free(d);
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 957671c..9dadf1e 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -815,6 +815,12 @@
       # comment 6
   END
   assert_equal(['# comment 1', 'two', '# comment 3', '', 'five', '# comment 6'], lines)
+
+  lines =<< trim END
+    [{
+      a: 0}]->string()->assert_equal("[{'a': 0}]")
+  END
+  CheckDefAndScriptSuccess(lines)
 enddef
 
 if has('channel')
diff --git a/src/version.c b/src/version.c
index c5fdf85..02fd3fa 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2393,
+/**/
     2392,
 /**/
     2391,